EP0831506A3 - Thermostat - Google Patents

Thermostat Download PDF

Info

Publication number
EP0831506A3
EP0831506A3 EP97307168A EP97307168A EP0831506A3 EP 0831506 A3 EP0831506 A3 EP 0831506A3 EP 97307168 A EP97307168 A EP 97307168A EP 97307168 A EP97307168 A EP 97307168A EP 0831506 A3 EP0831506 A3 EP 0831506A3
Authority
EP
European Patent Office
Prior art keywords
tube
switch assembly
rod
supporting member
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97307168A
Other languages
German (de)
French (fr)
Other versions
EP0831506A2 (en
Inventor
Alan c/o Sunvic Controls Ltd Burgess
Robert c/o Sunvic Control Ltd Hay
Susan c/o Sunvic Controls Ltd Allan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sunvic Controls Ltd
Original Assignee
Sunvic Controls Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sunvic Controls Ltd filed Critical Sunvic Controls Ltd
Publication of EP0831506A2 publication Critical patent/EP0831506A2/en
Publication of EP0831506A3 publication Critical patent/EP0831506A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/002—Thermally-actuated switches combined with protective means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
    • H01H37/48—Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible rigid rods or tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material

Abstract

A thermostat comprises a tube (10) with a switch assembly (12) mounted at a first end of the tube. A rod (14) extends within the tube and is secured to it adjacent its second end (16). The rod (14) has a coefficient of thermal expansion different from that of the tube (10) and is operatively coupled to the switch assembly (12) so as to cause the switch assembly (12) to change state in reaction to a change of temperature of the tube (10). There is carried on the rod (14) a first supporting member (42) formed from a material of a high melting point and a second supporting member (44) formed from a material with a melting point below that temperature which would be dangerous if exceeded in use. A spring (50) is trapped in compression between the first and second supporting members (42,44). An actuating assembly (60,62,64)) is operable under the action of the spring (50) on its release in the event of the second supporting member (44) melting, to cause the switch assembly (12) to change state so as to prevent further heating.
EP97307168A 1996-09-20 1997-09-16 Thermostat Withdrawn EP0831506A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9619676.1A GB9619676D0 (en) 1996-09-20 1996-09-20 Thermostat
GB9619676 1996-09-20

Publications (2)

Publication Number Publication Date
EP0831506A2 EP0831506A2 (en) 1998-03-25
EP0831506A3 true EP0831506A3 (en) 1998-10-21

Family

ID=10800257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97307168A Withdrawn EP0831506A3 (en) 1996-09-20 1997-09-16 Thermostat

Country Status (3)

Country Link
EP (1) EP0831506A3 (en)
GB (2) GB9619676D0 (en)
ZA (1) ZA978371B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2426869B (en) * 2005-06-03 2008-07-02 Sts Ltd Over temperature safety device
CN103036204B (en) * 2012-12-03 2015-04-01 昆明绿电科技有限公司 Dual-mode type automatic triggering fireproof protection device for photovoltaic combiner box

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3320388A (en) * 1965-12-30 1967-05-16 Robertshaw Controls Co Combination bimetal thermal switch mounted in between a rod and tube thermal responsive device
AU2392670A (en) * 1970-12-30 1972-07-06 Improvements in thermostats

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL102704C (en) * 1956-02-08
GB1108596A (en) * 1964-08-05 1968-04-03 Process Control Gear Ltd Improvements in thermostatically operated electric switches

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3320388A (en) * 1965-12-30 1967-05-16 Robertshaw Controls Co Combination bimetal thermal switch mounted in between a rod and tube thermal responsive device
AU2392670A (en) * 1970-12-30 1972-07-06 Improvements in thermostats

Also Published As

Publication number Publication date
EP0831506A2 (en) 1998-03-25
GB9720045D0 (en) 1997-11-19
GB2317502A (en) 1998-03-25
GB2317502B (en) 1998-09-02
GB9619676D0 (en) 1996-11-06
ZA978371B (en) 1998-03-23

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